This clinical trial aims to evaluate invasive disease-free survival when treated with a "de-escalated" regimen of hormonal and dual HER2-targeted therapy, with omission of chemotherapy. Objective is to evaluate 3-year invasive disease-free survival in patients with stage I HR+ HER2+ breast cancer treated with adjuvant HP plus endocrine therapy.
Contact your oncologist, oncology nurse or the Oncology Research Program Manager.